MLB Daily DeltaWeek 25 · September 11, 2026
Portrait of David Peterson
David Peterson
CHC · P
Change to
Portrait of Tatsuya Imai
Tatsuya Imai
HOU · P
Change to
Who's more valuable, rest of season

Tatsuya Imai.

He projects to help you in more roto categories the rest of the way — ERA and WHIP. David Peterson’s box score looks better right now, but the luck-stripped projection flips it.

Head-to-head
K
ERA
WHIP
W
SV n/a

Tatsuya Imai wins 2 categories (ERA, WHIP); David Peterson wins 1 (K); 1 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
David Peterson
92.5
Tatsuya Imai
94.8
Swinging-Strike %lg 11.0% · higher = better
David Peterson
10.2%
Tatsuya Imai
14.2%
Strikeout %lg 22.0% · higher = better
David Peterson
19.5%
Tatsuya Imai
28.0%
Chase %lg 28.5% · higher = better
David Peterson
28.6%
Tatsuya Imai
27.2%
Hard-Hit % Allowedlg 40.0% · lower = better
David Peterson
40.6%
Tatsuya Imai
45.0%
Barrel % Allowedlg 8.0% · lower = better
David Peterson
6.2%
Tatsuya Imai
9.4%
xwOBA Allowedlg .315 · lower = better
David Peterson
.341
Tatsuya Imai
.334
stabilized — trust it · small sample yet · dashed = league avg · right = better
05

The tape

Rest-of-season projection · bold = leads
rest-of-season projection current season projection range
Rate · earned-run quality
ERAlower is better
David Peterson
4.135.92
lg xERA 4.10
now 5.18
4.68
Tatsuya Imai
4.135.92
lg xERA 4.10
now 5.52
4.53
WHIPlower is better
David Peterson
1.271.68
now 1.59
1.47
Tatsuya Imai
1.271.68
now 1.36
1.46

Volume · rest of season
Strikeoutshigher is better
David Peterson
4074.80
now 56
11
Tatsuya Imai
4074.80
now 28
9
Winshigher is better
David Peterson
.0004.20
now 3
01
Tatsuya Imai
.0004.20
now 2
01

SV — not applicable. Both pitch out of the rotation.

If you already own them — trade angle
SellDavid Peterson — sell.conf 0.82
SellTatsuya Imai — sell.conf 0.75
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